Air cylinder housing



FIG. 1 is a perspective top left view illustrating an air cylinder housing showing my new design;

FIG. 2 is a bottom right perspective view thereof;

FIG. 3 is a top plan view thereof;

FIG. 4 is a right end view thereof; and,

FIG. 5 is a left end view thereof. 

The ornamental design for an air cylinder housing, as shown. 